Synthesis and characterization of microcapsules containing Rubitherm®RT27 obtained by spray drying

Borreguero, Ana M.; Valverde, J.L.; Rodrı́guez, Juan F.; Barber, Asa H.; Cubillo, José; Carmona, Manuel

doi:10.1016/j.cej.2010.10.055

Cited by 160 publications

(91 citation statements)

References 42 publications

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“…The test was performed at a constant relative humidity of 70% using a climatic chamber (WK11340, Weiss Umwelt Technik, UK), which is equipped with a K-type thermocouple in the middle. 51 The glass vials containing 5 g of dried nnonadecane/St-MMA nanocapsules or pure n-nonadecane contacting a K-type thermocouple were placed in the chamber. The accuracy of the temperature measurements was 0.1 o C. The samples were subjected to 1000 thermal cycles at a temperature under and above melting point of n-nonadecane.…”

Section: Methodsmentioning

confidence: 99%

Nano-encapsulated n-nonadecane using vinyl copolymer shell for thermal energy storage medium

et al. 2015

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This study is focused on the preparation and characterisation of n-nonadecane-vinyl copolymer shell nanocapsules for thermal energy storage medium. The n-nonadecane nanocapsules were prepared by a one-step miniemulsion in situ polymerisation method. n-Nonadecane was used as a core while styrene (St) and methylmethacrylate (MMA) was used as a vinyl copolymer shell. The Fourier transform infrared results confirmed that n-nonadecane nanocapsules were successfully synthesised. Morphological characteristic analysis indicates that these nnonadecane nanocapsules that were prepared using St/MMA (4:1) have a spherical shape and a narrow particle size distribution, with an average diameter of 160±11 nm. The maximum encapsulation ratio for n-nonadecane nanocapsules is 45.8 wt%. The DSC result of pure n-nonadecane and n-nonadecane nanocapsules exhibits two different peaks, which are related to their carbon numbers. The temperature and latent heat of melting and freezing of the n-nonadecane nanocapsules were determined to be 33.1 o C, 76.9 J/g and 30.2 o C, 82.0 J/g, respectively. Moreover, n-nonadecane nanocapsules exhibit good thermal and chemical stability, even after 1000 cycles of a thermal cycling test. Based on all of the results, it can be concluded that the n-nonadecane nanocapsules exhibit better energy storage and have good potential for buildings, textiles or other applications.

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Section: Methodsmentioning

confidence: 99%

Nano-encapsulated n-nonadecane using vinyl copolymer shell for thermal energy storage medium

et al. 2015

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“…On the one hand, Song et al, (2007) have improved the thermal stability of their mPCMs by adding 3 wt.% of silver nanoparticles in the core formulation. Besides, it was observed by Borreguero et al (2011) that their microcapsules obtained by spray drying and containing Rubitherm®RT27 with 2 wt.% of carbon nanofibers have higher thermal conductivity, which promote a faster heat absorption while maintaining their thermal energy storage capacity. One the other hand, Salaün et al (2008c) have observed that the addition of a reasonable fraction of polymeric nanoparticles containing hydrated salt with low thermal conductivity in the PCMs microcapsules results in a decrease by a factor of three of the effective thermal conductivity.…”

Section: New Development In Microencapsulation Process To Enhance Thementioning

confidence: 99%

“…Therefore, the most suitable methods include interfacial, in-situ and suspension polymerization methods for chemical processes and simple or complex phase coacervation for physico-chemical processes, and spray drying for the mechanical processes (Borreguero et al, 2011;Hawlader et al, 2000Hawlader et al, & 2003Teixeira et al, 2004). In all cases, the microencapsulation process includes two main steps, e.g.…”

Section: Principle and Generalitiesmentioning

confidence: 99%

The Manufacture of Microencapsulated Thermal Energy Storage Compounds Suitable for Smart Textile

Salaün¹

2011

Developments in Heat Transfer

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“…The solvent can be condensed by some means to reuse it for the next encapsulation [184]. Paraffin as a core material and gelatin and acacia as the shell material [25]; paraffin RT27 as a core material with polyethylene/ethylene vinyl acetate as the shell material [185], were used for microencapsulation through this process. This method is reviewed to produce Nano-particles electronic and optoelectronic, mechanical, chemical, cosmetic, medical, drug, and food technologies [186].…”

Section: Spray Drying and Congealingmentioning

confidence: 99%

Section: Spray Drying and Congealingmentioning

confidence: 99%

Micro-Encapsulated Phase Change Materials: A Review of Encapsulation, Safety and Thermal Characteristics

2016

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Phase change materials (PCMs) have been identified as potential candidates for building energy optimization by increasing the thermal mass of buildings. The increased thermal mass results in a drop in the cooling/heating loads, thus decreasing the energy demand in buildings. However, direct incorporation of PCMs into building elements undermines their structural performance, thereby posing a challenge for building integrity. In order to retain/improve building structural performance, as well as improving energy performance, micro-encapsulated PCMs are integrated into building materials. The integration of microencapsulation PCMs into building materials solves the PCM leakage problem and assures a good bond with building materials to achieve better structural performance. The aim of this article is to identify the optimum micro-encapsulation methods and materials for improving the energy, structural and safety performance of buildings. The article reviews the characteristics of micro-encapsulated PCMs relevant to building integration, focusing on safety rating, structural implications, and energy performance. The article uncovers the optimum combinations of the shell (encapsulant) and core (PCM) materials along with encapsulation methods by evaluating their merits and demerits.

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Synthesis and characterization of microcapsules containing Rubitherm®RT27 obtained by spray drying

Cited by 160 publications

References 42 publications

Nano-encapsulated n-nonadecane using vinyl copolymer shell for thermal energy storage medium

Nano-encapsulated n-nonadecane using vinyl copolymer shell for thermal energy storage medium

The Manufacture of Microencapsulated Thermal Energy Storage Compounds Suitable for Smart Textile

Micro-Encapsulated Phase Change Materials: A Review of Encapsulation, Safety and Thermal Characteristics

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